First of all, let me just say that I think it's wonderful that you rescued this horse. I would love to do the same thing one day.
A lot of people think that if a horse has laminitis or navicular that you need "special" shoes. I personally don't agree with that. We have a friend who's TWH got laminitis and she did Pete Ramey's barefoot trim and he was all better within a few months. Of course she got him boots so that he felt more comfortable.
Personally, I will never shoe any horse I own ever again, no matter what breed. Some say this is a selfish act on my part. I just brush that off because I KNOW that Pete Ramey's barefoot trim WORKS! I've seen it work for TB's, appys, QH's, TWH's, standardbreds, andalusions, drafts, arabs, morabs, just to name a few. If done CORRECTLY, a horse will be able to go barefoot. The transition period may take awhile because the hoof may have to heal from poor shoeing or poor trimming, but we need to give the horse that time.
I would not suggest all "natural barefoot trims" or whatever you want to call it. Like Strasser, or however you spell it. I think that method slaughters horse's feet, and I have personally seen MANY, MANY horses been put down after years of torture.
I WOULD suggest Pete Ramey or Jamie Jackson. Do a google search on them if you want. But I would suggest keeping your horse barefoot. It's healthier for their hooves.